WILL OCKENDEN: He works in a clinic in Conakry, the capital of Guinea, for the Infection Diseases Department.

Ebola has been his full time job since the first case was discovered several months ago.

He's lost patients and colleagues, and despite working to save lives, he told the BBC that parts of his family and society are ostracising him.

DR IBRAHIM: Even inside of my family, some of them doesn't even want to approach me. Some of them don't want to get next to me because of they think that I am inside the Ebola centre so that I can transmit them the virus.

Even if you try to make them understand, it is not easy for them. Some of my own family doesn't even want me to touch their own children.

WILL OCKENDEN: The latest warning from the World Health Organization won't make life any easier for the doctors treating infected patients and then being shunned by their families.

The UN's health agency says the scale of the outbreak has been vastly underestimated and extraordinary measures were needed to contain it.

TARIK JASAREVIC: There is still transmission going on in places that we are not aware of.

WILL OCKENDEN: Speaking to the BBC, the World Health Organization's Tarik Jasarevic rejected criticism the agency is needlessly whipping up fear.

TARIK JASAREVIC: This outbreak can have a negative impact much wider than just on those who are infected and their families. We are talking about economic impacts, social impact. We are talking about humanitarian impact. We could also speak about security impact. The fatality rate is very high. If we don't contain it, it will just continue.

WILL OCKENDEN: And he's called for more help.

TARIK JASAREVIC: These communities upon which we have put some restorative measures regarding travel, we need to provide them with enough food, enough medicines. So there is an incentive for them to stay and they get really the care they need.

WILL OCKENDEN: It's not just the World Health Organization sounding the alarm bells.

Medical charity Medecins Sans Frontieres (MSF) has released an update of its own, saying the spread of the virus is happening faster than can be responded to.

In Geneva, MSF president Joanne Liu said the situation is deteriorating fast.

JOANNE LIU: It's moving; it's advancing, but we have no clue how it's going to go around.

WILL OCKENDEN: As the death toll continues to grow, doctors on the ground like Dr Ibrahim say they'll continue to treat the sick.

DR IBRAHIM: I've chosen to treat people.

I understand there is one that don't understand what I am doing here, because everyone is afraid about this outbreak. So I understand them. But I don't have a choice, I have to deal with that.

ELIZABETH JACKSON: Dr Ibrahim, treating cases of Ebola in Guinea, ending that report from Will Ockenden.

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